Answer:
D. It was the first attempt to create an organization where nations worked together for peace.
Step-by-step explanation:
The League of Nations was an international body created by the Treaty of Versailles on June 28, 1919. It was proposed to establish the bases for peace and the reorganization of international relations after the end of the First World War. Although it failed to solve the serious problems that arose in the 20s and 30s, it is important because it was the first organization of its kind in history and the antecedent of the UN.